THECHANDRACARINA COMPLEX PROJECT: DECIPHERING THE ENIGMA OF CARINA'S DIFFUSE X-RAY EMISSION

Leisa K. Townsley, Patrick S. Broos, You-Hua Chu, Marc Gagné, Gordon P. Garmire, Robert A. Gruendl, Kenji Hamaguchi, Mordecai-Mark Mac Low, Thierry Montmerle, Yaël Nazé, M. S. Oey, Sangwook Park (+2 others)
2011 Astrophysical Journal Supplement Series  
We present a 1.42 square degree mosaic of diffuse X-ray emission in the Great Nebula in Carina from the Chandra X-ray Observatory Advanced CCD Imaging Spectrometer camera. After removing >14,000 X-ray point sources from the field, we smooth the remaining unresolved emission, tessellate it into segments of similar apparent surface brightness, and perform X-ray spectral fitting on those tessellates to infer the intrinsic properties of the X-ray-emitting plasma. By modeling faint resolved point
more » ... t resolved point sources, we estimate the contribution to the extended X-ray emission from unresolved point sources and show that the vast majority of Carina's unresolved X-ray emission is truly diffuse. Line-like correlated residuals in the X-ray spectral fits suggest that substantial X-ray emission is generated by charge exchange at the interfaces between Carina's hot, rarefied plasma and its many cold neutral pillars, ridges, and clumps.
doi:10.1088/0067-0049/194/1/15 fatcat:yb3xtqntvzc6nalamjdv4ksbam